Bump rollup from 3.19.1 to 3.20.0

Bumps [rollup](https://github.com/rollup/rollup) from 3.19.1 to 3.20.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v3.19.1...v3.20.0)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -31,7 +31,7 @@
         "postcss": "^8.4.21",
         "postcss-cli": "^10.1.0",
         "postcss-understrap-palette-generator": "git+https://github.com/understrap/postcss-understrap-palette-generator.git",
-        "rollup": "^3.19.1",
+        "rollup": "^3.20.0",
         "sass": "^1.59.3",
         "terser": "^5.16.6"
       },
@@ -5896,9 +5896,9 @@
       }
     },
     "node_modules/rollup": {
-      "version": "3.19.1",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-3.19.1.tgz",
-      "integrity": "sha512-lAbrdN7neYCg/8WaoWn/ckzCtz+jr70GFfYdlf50OF7387HTg+wiuiqJRFYawwSPpqfqDNYqK7smY/ks2iAudg==",
+      "version": "3.20.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-3.20.0.tgz",
+      "integrity": "sha512-YsIfrk80NqUDrxrjWPXUa7PWvAfegZEXHuPsEZg58fGCdjL1I9C1i/NaG+L+27kxxwkrG/QEDEQc8s/ynXWWGQ==",
       "dev": true,
       "bin": {
         "rollup": "dist/bin/rollup"

package.json

@@ -76,7 +76,7 @@
     "postcss": "^8.4.21",
     "postcss-cli": "^10.1.0",
     "postcss-understrap-palette-generator": "git+https://github.com/understrap/postcss-understrap-palette-generator.git",
-    "rollup": "^3.19.1",
+    "rollup": "^3.20.0",
     "sass": "^1.59.3",
     "terser": "^5.16.6"
   }